# Created by yang

from django.shortcuts import render
from django.forms import Form
from django.forms import fields
from django.forms import widgets
from django.forms.models import ModelChoiceField
from rbac import models


class UserInfoModelForm(Form):
    name = fields.CharField(required=True, error_messages={"required": "用户名不能为空"})
    email = fields.EmailField(required=True)

    # 这样写不能时时更新,因为它是静态字段,只会在声明这个class的时候访问数据库一次
    # part = fields.ChoiceField(choices=models.Role.objects.value_list("id","caption"))
    part = fields.ChoiceField()

    def __init__(self, *args, **kwargs):
        super().__init__(*args, **kwargs)
        # 此种方式下,每次new form对象,都会执行数据库查询,数据时时更新
        self.fields["part"].choices = models.Role.objects.value_list("id", "caption")


class UserInfoModelForm(Form):
    name = fields.CharField(required=True, error_messages={"required": "用户名不能为空"})
    email = fields.EmailField(required=True)

    # 此种方式和手动挡效果一样,但是它会默认将model_obj中的pk作为select选择option的value值,不能配置,不推荐使用
    part = ModelChoiceField(queryset=models.Role.objects.all())


def index(request):
    form = UserInfoModelForm()
    return render(request,"index.html",{"from":form})
